Magnetic Nanostructures with Perpendicular Anisotropy for Room Temperature Skyrmions
Magnetic Nanostructures with Perpendicular Anisotropy for Room Temperature Skyrmions
批准号:
1610060
负责人:
Kai Liu
金额:
$39.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2017
资助国家:
美国
项目状态:
已结题
起止时间:
2017-01-15 至 2019-01-31
中文摘要
点击翻译按钮获取中文摘要
英文摘要
Non-Technical Abstract:Magnetic skyrmions are a special type of arrangements of magnetic moments following a particular winding configuration. They possess some fascinating properties. For example, they cannot be continuously deformed to a state where all the moments point to the same direction. Skyrmion magnetic configurations are stable once they are formed, but a key challenge has been the realization of magnetic skyrmions at ambient conditions. This project focuses on construction of artificial skyrmion arrays, operational at elevated temperatures. The physical properties of these skyrmions are studied using a set of experimental techniques as well as simulations. These artificial skyrmions are expected to be stable even at room temperature and in zero magnetic field, thus are an exciting novel platform to explore the intriguing skyrmion physics. They also may have potential applications in highly energy-efficient data storage, magnetic memory and logic devices. This project provides opportunities to train junior researchers in university as well as national laboratory and user facilities. The principal investigator plans to initiate and actively participate in a variety of efforts to broaden participation from underrepresented groups through course offering, internships, exchange visits with partner universities, and other specific programs at the Magnetism Conference.Technical Abstract:Room temperature artificial skyrmion lattices based on nanostructures with perpendicular anisotropy are realized over macroscopic areas. A multi-step nanofabrication process is employed to achieve a variety of artificial magnetic skyrmions, including embedded skyrmion lattices, skyrmion "race-tracks", and skyrmion lattices on curved substrates. A set of magnetic field sequences is followed to establish the skyrmion states. Microstructural characterizations, magnetometry, first-order reversal curve, magnetic imaging, polarized neutron reflectometry, and magneto-transport measurements are carried out to probe the spatial and magnetic profile of skyrmions, their topological characteristics, stability, mobility, and dynamic responses to external stimuli. Simulations are employed to provide insight and guidance to the experiments. These studies not only help to advance fundamental understanding of artificial magnetic skyrmions, but also have potentially important technological impacts in low dissipation information storage, magnetic memory and logic devices, due to the topologically protected quantum states of the skyrmions. They also offer potentials to transform the energy landscape for future nanoelectronics in the "beyond Moore's law" era, which is well aligned with the National Strategic Computing Initiative and the Big Data Initiative, as well as grand challenges for future nanoelectronics. The principal investigator plans to initiate and actively participate in a wide variety of efforts to broaden participation from the international community, students, female scientists and other underrepresented groups, through his extensive service to the magnetism community. Students involved in the project receive excellent exposure to research experience in university, national laboratory and other research facilities.
期刊论文(3)
专著(0)
科研奖励(0)
会议论文
DOI:
10.1021/acs.nanolett.0c00137
发表时间:
2020-07-08
期刊:
NANO LETTERS
影响因子:
10.8
作者:
[Lo Conte, Roberto, Nandy, Ashis K., Wiesendanger, Roland]
通讯作者:
Wiesendanger, Roland
DOI:
10.1016/j.jmmm.2022.169898
发表时间:
2022-09
期刊:
Journal of Magnetism and Magnetic Materials
影响因子:
2.7
作者:
[P. Greene;Yong Hu;Z. Qiu;Kai Liu]
通讯作者:
P. Greene;Yong Hu;Z. Qiu;Kai Liu
Equipment: MRI: Track 1 Acquisition of a 3-Dimensional Nanolithography Instrument
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批准号:2320636
-
项目类别:Standard Grant
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资助金额:$54.98万
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财政年份:2023
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负责人:Kai Liu
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依托单位:
Magnetic Recording Media based on High Entropy Alloys
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批准号:2151809
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项目类别:Standard Grant
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资助金额:$39.0万
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财政年份:2022
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负责人:Kai Liu
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依托单位:
Chiral Spin Textures in Magnetic Nanostructures
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批准号:2005108
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项目类别:Continuing Grant
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资助金额:$51.98万
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财政年份:2020
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负责人:Kai Liu
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依托单位:
Magnetic Nanostructures with Perpendicular Anisotropy for Room Temperature Skyrmions
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批准号:1905468
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项目类别:Standard Grant
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资助金额:$20.93万
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财政年份:2018
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负责人:Kai Liu
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依托单位:
GOALI: High Magnetic Anisotropy Materials for Ultrahigh Density Heat-assisted Magnetic Recording Media.
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批准号:1933527
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项目类别:Standard Grant
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资助金额:$19.66万
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财政年份:2018
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负责人:Kai Liu
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依托单位:
Enabling Quantum Leap: Convergent Approach to the Challenges of Moore's Law National Science Foundation, Division of Materials Research, Condensed Matter Physics Program Workshop
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批准号:1829683
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项目类别:Standard Grant
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资助金额:$4.99万
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财政年份:2018
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负责人:Kai Liu
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依托单位:
MRI: Acquisition of a Magnetic Property Measurements System
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批准号:1828420
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项目类别:Standard Grant
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资助金额:$36.66万
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财政年份:2018
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负责人:Kai Liu
-
依托单位:
GOALI: High Magnetic Anisotropy Materials for Ultrahigh Density Heat-assisted Magnetic Recording Media.
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批准号:1611424
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项目类别:Standard Grant
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资助金额:$40.0万
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财政年份:2016
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负责人:Kai Liu
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依托单位:
EAGER: Magnetic Nanostructures with Perpendicular Anisotropy
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批准号:1543582
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项目类别:Standard Grant
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资助金额:$4.5万
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财政年份:2015
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负责人:Kai Liu
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依托单位:
Explosive Solutions of Stochastic Retarded Parabolic and Hyperbolic Differential Equations
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批准号:EP/I019987/1
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项目类别:Research Grant
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资助金额:$0.45万
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财政年份:2011
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负责人:Kai Liu
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依托单位:
Materials World Network: Magnetic Nanostructures with Perpendicular Anisotropy
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批准号:1008791
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项目类别:Standard Grant
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资助金额:$36.0万
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财政年份:2010
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负责人:Kai Liu
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依托单位:
Nanowire Spin-Valves for Antiferromagnet Spintronics
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批准号:0925626
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项目类别:Standard Grant
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资助金额:$33.0万
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财政年份:2009
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负责人:Kai Liu
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依托单位:
海外基金